hi all
my 1.6 focus is sick what happened was. i was race a golf home saturday afternoon and all of a sudden it started running on 3 and missing like fook so i took it back to work to sort out ive fitted a aftermarket coil pack ht leads and spark plugs started and everything was fine till i went to drive home now when u rev it above 3 grand it sounds like a old car pinking .i need this car at the mo as my rs is not ready yet CAN YOU HELP.